chart-lint.yaml

name: Lint and Test Charts

on:
  pull_request:
  workflow_dispatch:

jobs:
  lint-test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Fetch history
        run: git fetch --prune --unshallow

      - name: Set up Helm
        uses: azure/setup-helm@v3
        with:
          version: 'v3.4.0'

      - uses: actions/setup-python@v5
        with:
          python-version: 3.7

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.6.0

      - name: Set up nix
        uses: cachix/install-nix-action@v24
        with:
          nix_path: nixpkgs=channel:nixos-unstable

      - name: Set up nix store cache
        uses: actions/cache@v3
        with:
          path: /tmp/nix-closure
          # Build inputs are:
          # - shell.nix
          # - nix/ directory
          key: nix-store-${{ hashFiles('default.nix', 'nix') }}
          restore-keys: |
            nix-store-${{ hashFiles('default.nix', 'nix') }}-
            nix-store-

      - name: Loads nix derivation cache
        id: load-cache
        run: |
          if [[ -f /tmp/nix-closure/nix-shell.closure ]]; then
            nix-store --import --option require-sigs false < /tmp/nix-closure/nix-shell.closure
            echo "use-cache=true" >> $GITHUB_OUTPUT
          fi
      - run: |
          nix-env -f '<nixpkgs>' -iA pkgs.direnv
          nix-build
          nix-shell --run "direnv allow"

      - name: Store nix derivation cache
        run: |
          DERIVATION=$(readlink result)
          echo $DERIVATION
          mkdir -p /tmp/nix-closure
          nix-store --export $(nix-store -qR ${DERIVATION}) > /tmp/nix-closure/nix-shell.closure

      - name: Run chart-testing (list-changed)
        id: list-changed
        shell: direnv exec . bash -eo pipefail {0}
        run: |
          changed=$(ct list-changed)
          if [[ -n "$changed" ]]; then
            echo "use-cache=true" >> $GITHUB_OUTPUT
          fi

      - name: Run chart-testing (lint)
        id: lint
        shell: direnv exec . bash -eo pipefail {0}
        run: ct lint

      - name: Create kind cluster
        uses: helm/kind-action@v1.5.0
        with:
          node_image: "kindest/node:v1.29.0"
        # Only build a kind cluster if there are chart changes to test.
        if: steps.list-changed.outputs.changed == 'true'

      - name: Run chart-testing (install)
        if: steps.list-changed.outputs.changed == 'true'
        shell: direnv exec . bash -eo pipefail {0}
        run: |
          unset KUBECONFIG
          ct install